Hub



FIG. 1 is a perspective view of a hub showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a right side view thereof.

The broken line showing of the inner rim is included for the purpose of illustrating portions of the hub and forms no part of the claimed design. 

CLAIM The ornamental design for a hub, as shown and described. 